/* functions to compare a string/list
 * Copyright (C) 2006 Michael Richardson <mcr@xelerance.com>
 * Copyright (C) 2012 Paul Wouters <paul@libreswan.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 */

#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <stdio.h>
#include "sysdep.h"
#include "constants.h"
#include "lswalloc.h"
#include "whack.h"

/*
 * this is just like "strstr()", only it won't find matches
 * that are substrings (case-sensitive compare), but rather each match
 * must be anchored in front and after with whitespace and/or start/end
 * of string. 
 *
 */
bool lsw_alias_cmp(const char *needle, const char *haystack)
{
	int nlen = strlen(needle);
	const char *s = haystack;

	if (s == NULL)
	   return FALSE;

	while(*s!='\0') {
		/* does it match, and does it end with a space?
		 * check if things end at same place
		 */
		if(strncmp(s, needle, nlen)==0
		   && (s[nlen]==' ' || s[nlen]=='\t' || s[nlen]=='\0')) {
			return TRUE;
		}
		
        	for (;;) {
            	s++;
            	if (*s == '\0')
                	break;  /* or return FALSE: we're done */
            	if (*s == ' ' || *s == '\t') {
                	/* at whitespace: start next scan right after */
                	s++;
                	break;
            		}
        	}

	}
	
	return FALSE;
}

/*
 * Local Variables:
 * c-basic-offset:4
 * c-style: pluto
 * End:
 */
